User`s guide

Writing Wrapper S-Functions
4-9
Wrapper S-functions are useful when creating new algorithms that are
procedural in nature or when integrating legacy code into Simulink. However,
if you want to create code that is
• interpretive in nature in Simulink (i.e., highly-parameterized by operating
modes)
• heavily optimized in the Real-Time Workshop (i.e., no extra tests to decide
what mode the code is operating in)
then you must create a fully inlined TLC file foryourS-function.